题目内容：

根据句意及汉语提示，写出各单词的正确形式，每空一词。

1. Ladies and gentlemen, first I’ll       (介绍) myself to all of you.

2. Kitty didn’t get on well with her friends. At her birthday party,      (没有人) of them came.

3.My best friend Jimmy made a       (突然) decision and it made everyone feel surprised.  

4.It is very difficult for such young children to       (清除) the deep snow in the school.

5.With the development of the       (社会), more and more people live a happier life.